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1 Enrooth Perceives $18,000 Study Had Confirmed What City Has Been <br /> 2 Telling Residents All Along <br /> • 3 The Councilmember observed it had taken a $10,000 storm sewer study <br /> 4 and a $5 or $6,000 •sanitary sewer study to reconfirm that there is <br /> 5- really little the city can do outside of spending two or three <br /> 6 million dollars to protect a few homes from flooding during severe <br /> 7 rainfalls with the exception of pending a few more dollars to find <br /> 8 out through a topographical survey whether grading an alley might <br /> 9 alleviate some of the problems for one or two homeowners who can't <br /> 10 do anything else for themselves to solve their problems. <br /> it council Action <br /> 12 Mr. Childs was requested to get a quote for the survey for <br /> 13 presentation at a future Council meeting. <br /> 14 . Sanitary Sewer Study - Robertson <br /> 15 The engineer identified the Wilson Street trunk line, which runs from <br /> 16 29th Avenue N.E. to Lowry Avenue with jogs over to Kenzie Terrace and <br /> 17 down Coolidge and back to Lowry. He emphasized that any improvements <br /> 18 on this line had to be predicated on the 18 inch line at Lowry which <br /> 19 takes the sewage to a 33 inch line into Minneapolis. <br /> 20 Mr. Robertson indicated that 'if the City wanted to enlarge its lines <br /> 21 in order to increase the flow into the Metropolitan feeder line it <br /> • 22 would have to get the state agency's and Minneapolis permission to do <br /> 23 so. Conversations he had with those in charge had indicated they <br /> 24 were ready to accommodate "normal flows" but would take a harder line <br /> 25 with cities like St. Anthony who have excess flows into their system <br /> 26 from surface water getting into sanitary sewer systems through <br /> 27 foundation drains. <br /> 28 Mr. Robertson warned that it would be very .expensive for the City to <br /> 29 take measures like installing back water valves or sump pumps which <br /> 30 had been discussed estimating that if there were 400 homes with <br /> 31 drain tile connected to the sanitary system at $3 ,000.00 per home, it <br /> 32 would cost well over a million dollars to divorce the foundation <br /> 33 water from the sanitary sewer system. <br /> 34 The engineer agreed with Councilmember Enrooth that the City's 18 <br /> 35 inch pipes would have no problem handling normal sanitary sewage <br /> 36 flow without storm water infiltration through drain tiles. He said <br /> 37 the pipes are only one quarter filled during non-rain periods and <br /> 38 cracked pipelines and manhole seepage is minor compared to what goes <br /> 39 into the system from drain tiles when it rains. <br /> 40 Mr. Robertson agreed with Councilmember Ranallo that although the <br /> 41 inability of the sanitary sewer system to function during a storm <br /> 42 with the drain tiles connected contributed somewhat to the storm <br /> 43 sewer problems in the Murray/St. Anthony Boulevard, those problems <br /> 15 <br />